blood sister
Sister by birth
Blood sister refers to a sister by birth—sharing at least one biological parent—as distinguished from a stepsister or adopted sister.
More commonly, it describes a woman or girl who has sworn a bond of loyalty with another, traditionally by mingling blood from small cuts: We became blood sisters at summer camp.
The bond implies lifelong devotion.
Bond of mutual affection
- connectionA joining or relation
- camaraderieGoodwill among companions
- solidarityUnity among allies
- allianceFormal union of parties
confidante · companion · loyalty · trust · closeness · intimacy · devotion · partnership
friendship
Bond of mutual affection
- connectionA joining or relation
- camaraderieGoodwill among companions
- solidarityUnity among allies
alliance · confidante · companion · loyalty · trust · closeness · intimacy · devotion · partnership · affinity
sibling
Brother or sister
- consanguinityRelatedness through shared ancestry
- lineageDescent from progenitors
- ancestryFamily line of descent
heritage · genetics · relatives · family · clan · genealogy · kinfolk · kin · twin · family tree
oath
Formal binding promise
- pactFormal agreement between parties
- ceremonyFormal event marking occasions
- initiationFormal admission ceremony
vow · covenant · rite · pricking · mingling · binding · pledge · promise · compact · cut
- family membersmother, father, brother, son, daughter
- spiritual kinshipgodparent, godfather, godmother, godchild, godson
- chosen familychosen family, found family, framily, kindred spirits, adopted family
blood sistersister-in-law
Sibling by marriage
stepsister · half-sister · foster sister · sorority sister · chosen family
blood sistermortal enemy
Lethal sworn adversary
stranger · enemy · nemesis · archenemy · acquaintance
blood, sister, bloody, bloodied, blooded, bloodline, bloodstream, bloodshed, sisterly